i do not like to mix angels and discus, angels become a little aggresive as they get big.
There is little to put with discus, maybe neon, cardinals, rasboras, small fish that will not harass them. As much as I love discus they can be very sensitive. they need excellent water quality, I would say 2-3 water changes a week at the least. if you can not do that you are setting yourself up for a disapointment.